Ah, the wisdom of preschool teachers. If you've never seen the "magic jacket trick" that helps kids put their jackets on by themselves, Kim spells it out:
I think preschoolers learn this in class, but the younger toddlers can do it too. Tell your child that this is a "magic" trick place the jacket on the ground with inside facing up, arm holes closest to childs body at feet. Then have child put hands (up to forearms) in holes, and flip over head. Viola! Jacket be on!